English
increasability
From increase + -ability.
Formed from increase + -ability
Proto-Indo-European *ḱer- ‘to grow’
…
Latin crescō ‘to grow’
Latin increscō ‘to increase’
Anglo-Norman encreistre
Middle English encresen ‘to grow or increase’
English increase
Today it means
noun Ability to be increased.
Language periods are conventional ranges, not dates for this word.
Etymograph / increasability